Advanced Colon Cancer Symptoms
Oct 21, 2020
Source: Cainiu Health
Dr. Cui Zhenqin
Introduction
Advanced Colorectal Cancer Symptoms:
1. Changes in bowel habits, including increased or decreased frequency of bowel movements;
2. Rectal bleeding, with blood typically appearing bright red or dark red;
3. Bowel obstruction, manifesting as abdominal pain, distension, constipation, and impaired flatus passage;
4. Abdominal mass—firm in consistency and irregular in shape;
5. Systemic symptoms, such as weight loss and anemia;
6. Metastatic symptoms, including lymphadenopathy.
Colorectal cancer is a common malignant tumor of the gastrointestinal tract arising in the colon, most frequently occurring at the junction between the rectum and sigmoid colon. Because colorectal cancer often develops insidiously—with few or no noticeable symptoms in its early stages—patients frequently present with advanced disease by the time symptoms become apparent. So, what are the symptoms of advanced (late-stage) colorectal cancer? Below is an overview.
Symptoms of Advanced Colorectal Cancer
1. Changes in Bowel Habits
Altered bowel habits are among the earliest and most common symptoms of colorectal cancer. Right-sided colon cancers typically manifest as loose stools containing pus and blood, along with either increased or decreased frequency of bowel movements. As the disease progresses to an advanced stage, tumor growth may obstruct the intestinal lumen, leading to alternating episodes of diarrhea and constipation. In contrast, left-sided colon cancers more commonly cause progressive difficulty with defecation, which worsens over time.
2. Rectal Bleeding
Rectal bleeding is another hallmark symptom. Early-stage bleeding is often minimal and not visible to the naked eye, making it easy for patients to overlook. In advanced disease, however, overt rectal bleeding becomes evident—blood may appear bright red or dark red, and typically occurs separately from stool (i.e., blood is not mixed with feces). This presentation can easily be mistaken for hemorrhoids, warranting heightened clinical vigilance.
3. Intestinal Obstruction
In late-stage colorectal cancer, intestinal obstruction may occur due to tumor mass filling the lumen, mechanical narrowing (strangulation) of the bowel wall, or external compression/adhesion caused by peritoneal involvement. Clinical manifestations include abdominal pain, distension, constipation, vomiting, hyperactive bowel sounds, and impaired flatus passage.
4. Abdominal Mass
Due to tumor infiltration into the omentum and adjacent tissues, patients with advanced colorectal cancer may develop a palpable abdominal mass. Such masses are typically firm and irregularly shaped. Initially, they may retain some mobility with intestinal peristalsis; however, as tumor invasion deepens, the mass becomes fixed and immobile.
5. Systemic Symptoms
As a catabolic disease, colorectal cancer leads to substantial nutrient depletion. Combined with chronic blood loss, this results in prominent systemic manifestations—including varying degrees of malnutrition, weight loss, anemia, and fatigue. In end-stage disease, patients may develop cancer cachexia, requiring urgent clinical attention.
6. Metastatic Symptoms
By the time colorectal cancer reaches an advanced stage, local and distant metastases are common. Typical sites of metastasis include regional lymph nodes, liver, lungs, brain, and bone. Accordingly, patients may experience corresponding symptoms such as lymphadenopathy, right upper quadrant pain (hepatic metastases), cough, hemoptysis (pulmonary metastases), headache, visual impairment (brain metastases), bone pain, or pathological fractures (osseous metastases).
The above outlines the key symptoms associated with advanced colorectal cancer. We hope this information proves helpful.
